| Company | Location | Certifications | License # |
|---|---|---|---|
| BGM Construction Inc | Buffalo, MN | Installer | L3841 |
| Bursch Bros Inc | Hanover, MN | Installer | L2424 |
| Bursch Outdoor Services Inc. | Buffalo, MN | Installer | L4170 |
| CDR Excavating Inc | Delano, MN | Installer | L3293 |
| CK Septic Service & Toilet Rental LLC | Annandale, MN | Pumper | L2723 |
| Davis Excavating Inc | Waverly, MN | Installer | L3652 |
| Duane's Septic Service, LLC | Saint Michael, MN | Pumper | L4286 |
| Elfmann Excavating LLC | Annandale, MN | DesignerInstaller | L3691 |
| Elmer J Peterson Company | Delano, MN | InstallerPumper | L219 |
| Ferrell Excavating Inc | Maple Lake, MN | DesignerInspectorInstaller | L489 |
| Flygare Excavating, LLC | Annandale, MN | DesignerInstaller | L4355 |
| Hayes & Sons Inc | Montrose, MN | Installer | L640 |
| Honey Wagon Pumping LLC | South Haven, MN | Pumper | L4117 |
| Jakes Excavating Incorporated | Buffalo, MN | Installer | L3363 |
| Kothrade Sewer Water & Excavating Inc | Hanover, MN | InstallerPumper | L192 |
| Lindberg Excavating Inc. | Cokato, MN | Installer | L4220 |
| Mares Excavating LLC | Annandale, MN | Installer | L902 |
| Melgaard Services | Maple Lake, MN | Pumper | L4069 |
| Metro General Services Inc | Saint Michael, MN | Installer | L1546 |
| Minnesota Geotechnical Services, LLC | Maple Lake, MN | Designer (Advanced)Inspector (Advanced) | L3203 |
| Morris Excavting & Drainage, LLC | Howard Lake, MN | Installer | L961 |
| MSB Excavating & Tiling LLC | Howard Lake, MN | Installer | L4501 |
| Otto Associates, Engineers & Land Surveyors, Inc | Buffalo, MN | Designer | L831 |
| Patnode Brothers Inc | Saint Michael, MN | DesignerInstaller | L3843 |
| Rolstad Construction Co | Buffalo, MN | Installer | L2112 |
| Rusty's Perculation Testing | Hanover, MN | DesignerInspector | L810 |
| Schirmers Percolation Testing, Inc | Saint Michael, MN | DesignerInspector | L394 |
| Schluender Construction Inc | Monticello, MN | Installer | L913 |
| Schmitz Excavating | Monticello, MN | InstallerPumper | L495 |
| Steve 'O' Septic | Monticello, MN | Pumper | L3125 |
| Wulf Excavating Inc. | Buffalo, MN | Installer | L4157 |
31 companies in the Minnesota MPCA SSTS licensed business registry are based in Wright County as of 2026-07-23. Companies based elsewhere in Minnesota also commonly serve the county.
Tell us what you need — we'll connect you with state-certified companies serving your area. No obligation.